Choke-coil for moving-picture machines.



H. J. BECK. CHOKE COIL FOR MOVING PICTURE MACHINES. APPLICATION 'I'ILEI)JULY so, 1908.

907,717. I Patented Dec.29,1908.

m i J :\&1 v FEQ v Q m J v N. I 1 J N w E n I. awe W604: WWW 00% N3 fi y6 I flliroznu o 1n: mmms FETERS C0,, wasumcmu v c UNITED STATES PATENTOFFICE.

HARRY .T. BECK, OF PHILIPSBURG, PENNSYLVANIA.

CHOKE-COIL FOB MOVING-PICTURE MACHINES.

To all whom it may concern:

Be it known that I, HARRY J. BECK, a citizen of the United States,residing at Philips burg, in the county of Center and State ofPennsylvania, have invented certain new and useful Improvements inChoke-Coils for Moving-Picture Machines; and I do declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention relates to new and useful improvements in choke coilsespecially adapted for use in connection with moving picture machines,and has for its object to provide a coil of this type which may bereadily and easily adjusted to increase or decrease the current suppliedto the picture machine.

l/Vith these and other objects in view, the invention consists ofcertain novel features of construction, combination and arrangement ofparts, as will be more fully described and particularly pointed out inthe appended claims.

In the embodiment illustrated, Figure 1 is a side elevation of a chokecoil constructed in accordance with the invention Fig. 2 is a transversevertical section taken on line 22 of Fig. 1; and Fig. 3 is a horizontalsection taken on line 33 of Fig. 1.

In the embodiment illustrated the coil comprises an elongated U-shapedcore 1 formed from metallic plates. One end of the base of the core issupported by a support 2 made from a single piece of metal bent to forma central U-shaped body adapted to receive one end of the core base, anda pair of laterally spaced supporting legs 4. The opposite end of thecore base is supported by a second support 5 bent to form a centralU-shaped body 6 to receive the base, then extended to form horizontalsupporting portions 7, and then bent to form depending supporting legs8. The plates forming the side pieces of the core are held firmlytogether by insulation 9 in the form of cord which is wound around theplates.

Upright stud bolts 10 are screwed into the supporting portions 7 of thesupport 5 and are adapted to receive the end pieces 11 of an openapproximate rectangular coil supporting frame 12 which is mounted uponone of the side pieces of the core. The coil 13- is next placed upon thecoil supporting base Specification of Letters Patent.

Application filed July 30, 1908.

Patented Dec. 29, 1908.

Serial No. 446,113.

or may be lowered to decrease the current by screwing of these nuts downupon the stud bolts. By providing a standard U- shaped core the same maybe used over a range from about 25 to 133 cycles by providing the coilwith smaller or larger wires as the case may be and with the propernumber of turns.

In practice the current is lead to the coil by a conductor 15 whichleads to a suitable source of energy and is led from the coil to themoving picture machine by a second conductor 16. The coil supportingframe is preferably made in two corresponding sections 1 7 held togetherby flat clamping straps 18 provided with clips 19 to receive the edgesof said sections. The lates forming the base of the core may also esecurely clam ed together by a clamping band 20 exten ing around thebase.

From the foregoing description, taken in connection with theaccompanying draw- -ings, the construction and operation of theinvention will be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention as deiined in theappended claims.

Having thus described and ascertained the nature of my invention, what Iclaim as new and desire to secure by Letters-Patent, is

1. In a choke coil of the class described, the combination with anapproximately U- shaped core, supporting means for the base of the core,a coil supporting plate mounted upon one of the side pieces of the core,a resistance coil mounted upon said supporting frame, and means foradjusting said frame vertically.

2. In a choke coil of the character described, the combination with anapproximately U-shaped core, of a support for one end of the core basecomprising a central U-shaped body adapted to receive said base,horizontal supporting portions and depend ing legs, upright stud boltsscrewing into the horizontal supporting portions of said sup- Intestimony Whereo1 I have hereunto set port, an openepproxlmetelyrectangular my hand 1n presence of two subscrlblng coil supporting framemounted upon the Witnesses.

stud bolts, a resistance ooil mounted upon I HARRY J. BECK. saidsupporting frame and adjusting nuts Witnesses: screwing upon said studbolts for adjusting GEO. WV. ZEIGLER,

the coil supporting frame Vertically. H. O. GRAIN.

